Whilst studying from Dr. Tom Constable's awesome notes, I came across a new word ...
TheFreeDictionary.com has to be servile or submissive
Merriam-Webster.com has to act in a subservient manner.
However, I feel Thesaurus.com is missing a few synonyms: Brown-Noser, Lick-spittle and Toady.
PS - Work this into three conversations today and you'll own it. Forever. Word!